28516497 has 24 divisors (see below), whose sum is σ = 41732352. Its totient is φ = 17299200.

The previous prime is 28516493. The next prime is 28516507. The reversal of 28516497 is 79461582.

It is not a de Polignac number, because 28516497 - 2² = 28516493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28516493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26347 + ... + 27407.

It is an arithmetic number, because the mean of its divisors is an integer number (1738848).

Almost surely, 2^28516497 is an apocalyptic number.

It is an amenable number.

28516497 is a deficient number, since it is larger than the sum of its proper divisors (13215855).

28516497 is a wasteful number, since it uses less digits than its factorization.

28516497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1112 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 28516497 is about 5340.0839881036. The cubic root of 28516497 is about 305.5146627271.

The spelling of 28516497 in words is "twenty-eight million, five hundred sixteen thousand, four hundred ninety-seven".